Indicating instrument



Dec. 29, 1931. H. SCHLAICH 1,333,962

INDICATING INSTRUMENT Filed Sept. 20, 1927 2 Sheets-Sheet 2 BY W ZZ Z ATTORNEY purposes.

Patented Dec. 29, 1931 UNITED FSTAFTEVS'FF PATENT. OFFICE HERMANscHLAIcH, or LONG .ISLLAND CITY, NEW YORK INDIGATING INSTRUMENT Application m d: Septeinter 20, 1927.. Serial 110. 220,666.

This inventionrelatesto thermometers and similar instruments and more partlcularlyto instruments adapted for use on articlessuch as desks and tables, and is in the nature of an improvement upon theinvention disclosed in Letters Patent of the United States No. 1,458,258, granted to 'me' on ,December 18 1923.4 Z j The main object of the invention is to provide a novel and improved structure for su'ch devices, simple in structure attractive in appearance, economicalito manufacture, convenientto assemble, and arranged for'ready and effective adjustment, as for calibration The invention will be aerate mani following description taken in-connect ion with the accompanying drawingsin which r I Fig. 1 is a top plan view illustrating one embodiment ofthe invention;

Fig. 2 is asectional viewtaken 1 line 22 of'Fig. I i

Fig. 3 is a bottom view in Fig. 1;

of the shown Fig. 4. 's a sectional View takenlalong line4-4 of Fig. 2; Fig.5 is. a view illustrating'one'of there movable panels;and? Fig. 6 is a=detailview:illustrating the at, tachment of the dial to the rest of the instrument. 2' Referring to" the drawings,' th'e instrument includes a casing 10 of'su itable material, such r as glass, which includesj'al body 'portion'll which may be hexagonal'in cross section and tapered gradually-from the botoln toth'etop, an upper portion 12 inthe form. ofadome through'whi-ch theindications of the instrument may be read, and-a base in 'the formjof an annular flange 13,extending outwardly from the loweriend of the casingportion 11' andqhaving a downwardly projecting pef ripheral flange provided at suitable intervals r with feet l l 'bet'ween .whiehthere' are QOPenings permitting the passage of" air into out of the I casing. The remaining (portions of the" instrument may be inserted in said casing fromv below and heldqin positionby screws orbolts extending through'the'base flange 13 at suitable, intervals ;and through other portions of the structure which are held to the flange 13' bysaid bolts 15 and nut-s16- 1 The instrument also comprises a metal shell 17 havinga flange 18 designed to engage the lower? face of the base flange l3'and a' portion extending upwardly therefrom and ofsubstantiallythe same shape as the glass casing portion 10 but provided with channeL like'depressed portions 19' (Fig.2). At the upper end of its hexagonal portion, shell 17 isformedinto a dial support 20 having an annular channel 21 at itsperiphery, and at its center an upwardly projecting conical hollow portion 22"through which projects a stem or I shaft 23 carrying an indicator 24 to cooperate with ;a dial 25' having at its center. an

opening to receive the conicalmeinber22 and resting at'its periphery in said channel 21.

The dialj25 is providedwith a suitable scale 26to cooperate with the indicator or vane 24. .The opening at the top of portion 22 provides a bearing for the shaft 23 at a point substantally above the dial; and therefore provides better side support for the shaft 23.

fInl the lower, part of the instrument'the shaft or stem 23 isattached at one end to a bi-inet-allic spring 271 which is supportedin amanner to bedescribed hereinafter on a member 28 provided with a circular opening toper mit the passage of the stem 23 therethrough andbeingprovided with adownwardly extending flange 29ffrom which project-lugs -30 to receive the bolts 15. The stem 23may-rest atitsl-ower endin a conical thrust bearing .31 formed ina protective flange 18 ofthe member 17', which are passed downwardly through openings in the ears 3Q and, andclinchedheneath the same.

ill

The member 28 is formed at its center with an eyelet portion through which the stem 23 passes and of which the lower edge is spread to underlie the central portion of a member 36 pivoted thereon and to which the outer end of the bi-metallic strip 27 is attached as hereinafter described. The member 36 may be provided at its periphery with an annular ridge 3? which frictionally engages the lower face of the member 28 and with a flange 38 projecting downwardly at the outer side of said annular ridge and having at its lower edge outwardly projecting lugs or fingers 39 to facilitate the adjustment of member 36 to different positions about the eyelet at the center of member 28.

The member 36 is provided with downwardly projecting tongues 40 struck from the metal and turned downwardly and out wardly therefrom to positions substantially perpendicular to the central part thereof to provide suitable attaching means for the outer end of the oi-metallic strip or coil 27. The member 36 is also provided with members 41 struck downwardly from the metal thereof and arranged substantially in a circle to limit the outward movement of the bimetallic strip 27 when jarred and thus to prevent straining of the strip beyond the elastic limit thereof. It will be apparent that by turning the member 36, the stem 23 of the indicator 24 may be turned to bring the indicator to a position to give .the'proper indications on the scale 26. To facilitate the adjustment of the member 36 and conse quently of the indicator 24 the lower protective member 32 is provided with a slot 42 to permit insertion therethrough of an implement to engage the lugs 39 and turn the member 36. As indicated on Fig. 2, the member 28 may be provided with suitable openings 43 immediately above the annular ridge 38 of the member 36. I

As indicated in Fig. 6, the dial 25 may be secured in position on the dial support 20 by means of tongues25 projecting through openings in the bottom of the annular channel 21 and clinched beneath the metal at'the outer edge of said channel. Preferably the depressed panellike portions 19 of the member 17 are used to hold certain panel inembers 44 which may be used for ornamental or advertising purposes andmay be secured in position by tongues 45 extending through openings 46 in the shell 17 and clinched inside the shell. i i

It will be understood that thefeature of forming the outer casing and base all in one piece is very advantageous and that the portion of the instrument to be placed inside said casing is so arranged as to be especially adapted for assembly of the parts and for insertion iu'and removal from the casing member. The parts of the instrument are also designed to provide an easy and effective adjustment of the bi-met-allic strip to effect suitable calibration of the instrument.

lVhile I have illustrated and described in detail certain preferred forms of my invention, it is to be understood that changes may be made therein and the invention embodied in other structures. I do not, therefore, desire to limit myself to the specific construe tions illustrated but intend to cover my invention broadly in whatever form its principle may be utilized.

Having thus described my invention, I claim:

1; An indicating instrument, including a shell having a convex upper face, an annular channel in the margin thereof and a boss at the center thereof, a dial seated at its edge in said channel and fitting the boss, a shaft passing centrally through the dial and the top of said shell and having bearing in said boss, an indicator on said shaft above said dial. and means for rotating the shaft.

2. An indicating instrument, including a shell having a top with an annular channel and openings therethrough in said channel, a dial seated at its edge in said channel and provided with tongues passing through said openings and engaging the inner surface of the shell, a shaft passing centrally through the dial, an indicator on said shaft above said dial and means for rotating the shaft.

3; An indicating instrument, including a shell having at its top a central upward projection with a central opening, a domeshaped dial having a central opening to receive the upward projection on said shell, means to secure the dial to said shell, a shaft passing through the opening in the central upward projection of the shell, a vane on said shaft above said dial, and means for rotating the shaft. 7

4'. An indicating instrument, including a shell having at its topa central upward hollow projection with a central bearing opening at its top, a dome-shaped dial having a central opening to receive the upward projection onsaid shell, a shaft passing through the bearing opening in the central upward projection of the shell, and a vane on said shaft above said dial, a bi-metallic strip connected at one end with said shaft and at the other end with said shell, and a member providing a bearing for the lower end of said shaft.

5. An indicating instrument, including a shell having a dome-shaped top with. a peripheral annular channel and a central upward projection with an opening therein, a dome-shaped dialfitting over the top of the shell with its edge seated in said channel, said dial having a central opening to receive said upward projection, an indicator operating above said dial, and means for operating the indicator.

;6. An indicating instrument, including a shell having a dome-shaped top and a body portion of substantially regular polygonal cross-section, a transparent housing enclosing said shell and substantially fitting the body portion thereof, the sides of said body portion being perforated to facilitate the attachment thereto of display panels, a dome shaped dial fitting on the top of said shell, a shaft passing through the center of said dial, an indicator on said shaft adjacent said dial, and means for rotating the shaft.

7 An indicating instrument, including a shell having a dome-shaped. top, a body portion of substantially regular polygonal crosssection and an outstanding flangeat the base of said body portion, a dome-shaped dial fitting on the top of said shell, a shaft passing through the center of said dial, an indicator on said shaft adjacent said dial, a bi metallic coil connected at one end with said shell and at the other end to said shaft, a glass casing open at the bottom for insertion of the other parts and having a dome portion over said dial and indicator, a polygonal body portion, and an outstanding flange to the lower side of which the base flange of said shell is secured.

8. A temperature indicating device, in

cluding a supporting plate having a central opening a shaft extending through said opening, a member pivoted to said plate at its lower side to turnaround said opening and held frictlonally agamst rotat1on,sa1 d member having a lug projecting therefrom and openings arrangedin a circle in the marginal portion thereof,a bi-metallic coil at tached at one end to said shaft and at the other end to said lug, and a protective plate beneath said pivoted member and having an opening at a distance from theaxis ofthe shaft to permit access to said openings arranged in a circle for adjustment of the pivoted member,said plate being also provided with a depression forming an end bearing and support for the lower end of the shaft, and in which the shaft rests.

9. A temperature indicating device, including a supporting plate having a central opening, 'a shaft extending through said opening, a member pivoted to said plate at its lower side to turn around said opening and held frictionally against such turning, said member having downward projections arranged in a circle at its periphery and a" lug projecting downwardly inside said circle. a bi-metallic coil attached atone end tosaid shaft and at the other end to said lug, and a plate beneath said downward projections and said coil and having a central bearing for the lower end of said shaft and an arcuate slot beneath said projections to permit engagement thereof through said slot and ad- 7 justment thereby of said coil.

10. A temperature indicating instrument,

including a supporting plate having a centraliopening, an adjusting member pivotally mounted on said' plate to turn about said opening and having circularly arranged downwardly projecting guides, an indicator shaft 'extendingthrough said opening, anda bi metalliccoil attached at one end to said the coil'that permanent distortion of the coil by jarring-isprevented. j

P lly fln' anindicating'instrument, a dial, a she'll barrying said dial and having a body portion-with an outwardly extending flange at its base, afcentral shaft projecting through said dial, controlling meansfor said shaft comprising'a supporting member with a cen tralopenin'gtforsaidshaft andeXtending beneath said flange, an adjusting member supportedby said-supporting member for rota tion about said opening, a bianetallic coil attached atoneend to said shaft and at the otherend to said adjusting member, a plate protecting the lower end of the instrument andhavingafibearing for the lower end of saidshaft, a single piece glass casing having top through which the indicator and dial mayb eobserved and'having at its "lower edge a baseportionincluding an outwardly extending peripheral flange and a flange ex tending downwardly from the outer edge of said outwardly extending-flange, and means to secure-said shell, supporting member and protecting plate to said outwardly'extending flange of the casing.

12. In an indicatinginstrument, a single piece glass casing open at the bottom only and comprising an annular base with a down wardly projecting flange cut away at its low-r er edge to admit air, a body portion projecting upwardly from said base and a dome at the top of'said body portion; a metal shell having a dial-carrying'portion, a body portionto fitinto said body portion of the casing and a base projecting beneath the annular base of the casing'but inside the downi V wardly projecting flange; a thermostatic coil; means for adjusting one end of the thermostatic coil including a supporting 13; In an indicating instrument, a dial, a shell carry ng said dial and having a body portion with an outwardly extending flange atits base, a central shaft projecting through said dial, controlling means for said shaft "comprising a supporting member with'a central opening for said shaft and extending beneathsaid flange, an adjusting member supported-by said supportmg member for rotation about said opening, a bi-metallic coil attached at one end of said shaft and at the other end to said adjusting member, a plate protecting the lower end of the instrument and having a bearing for the lower end of said shaft, a single piece glass casing having a top through which the indicator and dial may be observed and having at its lower edge a base portion including an outwardly ex tending peripheral flange and a flange extending downwardly from the outer edge of said outwardly extending flange, means to secure said supporting member and protecting plate to the outwardly extending base flange of the body portion of the shell to enable these parts to be inserted and removed as a unit, and means to secure said shell, supporting member and protecting plate to said outwardly extending flange of the casing.

14. An indicating instrument adapted for advertisin purposes comprising a movement housing having lateral walls, an indicator thereabove, means in the housing and connected to'the indicator to operate the same, and a one piece transparent glass enclosure for the housing and indicator substantially fitting the lateral walls of the housing, the lateral walls of the housing being perforated to facilitate the securement thereto of advertising panels visible through the glass enclosure.

In testimony whereof I have afiixed my signature to this specification.

HERMAN SGHLAICH. 

